CN215990391U - Brushless DC motor - Google Patents
Brushless DC motor Download PDFInfo
- Publication number
- CN215990391U CN215990391U CN202122080807.9U CN202122080807U CN215990391U CN 215990391 U CN215990391 U CN 215990391U CN 202122080807 U CN202122080807 U CN 202122080807U CN 215990391 U CN215990391 U CN 215990391U
- Authority
- CN
- China
- Prior art keywords
- metal
- motor
- rear cover
- brushless
- cover
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Motor Or Generator Cooling System (AREA)
- Motor Or Generator Frames (AREA)
Abstract
The utility model discloses a brushless direct current motor, wherein two ends of a rotor shaft of the brushless direct current motor are respectively connected with a metal front cover and a metal rear cover through a front bearing and a rear bearing, an external thread on the side surface of the metal front cover is rotationally connected with an internal thread on the inner surface of a metal shell, the end surface of the metal shell close to one side of the metal rear cover is provided with at least 3 riveting point parts along the circumferential direction, and the metal shell is connected with the metal rear cover through at least 3 riveting point parts; the metal shell is provided with a plurality of exhaust holes at intervals in the area around the fan blade, and the metal rear cover is provided with a plurality of air inlet holes at intervals. The direct current brushless motor ensures the cooling of the motor, prolongs the service life of the motor, and improves the power and the efficiency of the motor.
Description
Technical Field
The utility model relates to the technical field of direct current motors, in particular to a brushless direct current motor.
Background
The structure of the direct current motor is composed of a stator and a rotor, wherein the stationary part of the direct current motor is called the stator when the direct current motor operates, the stator mainly functions to generate a magnetic field, the rotating part of the direct current motor is called the rotor when the direct current motor operates, the main function of the direct current motor is to generate electromagnetic torque and induced electromotive force, and the direct current motor is a pivot for energy conversion, so the direct current motor is generally called an armature and is widely applied due to good speed regulation performance.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a brushless direct current motor, which ensures the cooling of the motor, prolongs the service life of the motor and improves the power and the efficiency of the motor.
In order to achieve the purpose, the utility model adopts the technical scheme that: a brushless dc motor comprising: the rotor core is positioned in the stator, a metal front cover and a metal rear cover are respectively arranged on the front end face and the rear end face of the metal casing, the rotor core is fixed on the outer side surface of a rotor shaft, two ends of the rotor shaft are respectively connected with the metal front cover and the metal rear cover through a front bearing and a rear bearing, external threads on the side surface of the metal front cover are rotatably connected with internal threads on the inner surface of the metal casing, at least 3 riveting point parts are circumferentially arranged on the end face of one side of the metal casing close to the metal rear cover, and the metal casing is connected with the metal rear cover through at least 3 riveting point parts;
the metal shell is provided with a plurality of exhaust holes at intervals in the area around the fan blade, and the metal rear cover is provided with a plurality of air inlet holes at intervals.
The further improved scheme in the technical scheme is as follows:
1. in the above scheme, the casing is an aluminum casing, and the metal front cover and the metal rear cover are both aluminum covers.
2. In the above scheme, the diameter ratio of the length of the casing to the metal front cover and the metal rear cover is 1: 0.9 to 1.1.
3. In the above scheme, the air inlet is an arc-shaped air inlet.
4. In the scheme, the end face of the rear end of the rotor shaft is flush with the outer surface of the metal rear cover.
Due to the application of the technical scheme, compared with the prior art, the utility model has the following advantages:
1. the utility model relates to a brushless direct current motor, wherein two ends of a rotor shaft are respectively connected with a metal front cover and a metal rear cover through a front bearing and a rear bearing, external threads on the side surface of the metal front cover are rotatably connected with internal threads on the inner surface of a machine shell, at least 3 riveting point parts are arranged on the end surface of the machine shell close to one side of the metal rear cover along the circumferential direction, the machine shell is connected with the metal rear cover through at least 3 riveting point parts, the motor assembly, the subsequent disassembly and maintenance are facilitated, the three parts form a metal sealed whole, and the electromagnetic flux of a stator winding and a rotor winding is enhanced, so that the power and the efficiency of the motor are improved.
2. The utility model relates to a brushless direct current motor, wherein fan blades are sleeved on a rotor shaft and positioned between a stator, a rotor iron core and a metal front cover, a plurality of exhaust holes are formed in a region of a machine shell positioned at the periphery of the fan blades at intervals, a plurality of air inlet holes are formed in the metal rear cover at intervals, when the motor rotates at a high speed, the rotor iron core and the fan blades drive air to circulate together, so that external air can enter the motor from the air inlet holes and is exhausted from the exhaust holes, the cooling of the motor is ensured, and the service life of the motor is prolonged.
Drawings
FIG. 1 is a schematic cross-sectional view of a brushless DC motor according to the present invention;
FIG. 2 is a schematic diagram of the right-hand side view of FIG. 1;
FIG. 3 is a left side view schematic of the structure of FIG. 1;
FIG. 4 is a schematic view of the external structure of FIG. 1;
FIG. 5 is a schematic structural diagram of a metal front cover of the brushless DC motor according to the present invention;
fig. 6 is a schematic structural diagram of a housing of the brushless dc motor according to the present invention.
In the above drawings: 1. a housing; 2. a stator; 3. a rotor core; 4. a metal front cover; 5. a metal rear cover; 6. a rotor shaft; 7. a front bearing; 8. a rear bearing; 9. an external thread; 10. an internal thread; 11. riveting point parts; 12. a threaded hole; 13. a fan blade; 14. an air inlet; 15. and (4) exhausting holes.
Detailed Description
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention; the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; furthermore, unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, as they may be fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Example 1: a brushless dc motor comprising: the motor comprises a machine shell 1, a stator 2 and a rotor core 3 which are positioned in the machine shell 1, wherein the rotor core 3 is positioned in the stator 2, a metal front cover 4 and a metal rear cover 5 are respectively installed on the front end surface and the rear end surface of the machine shell 1, the rotor core 3 is fixed on the outer side surface of a rotor shaft 6, two ends of the rotor shaft 6 are respectively connected with the metal front cover 4 and the metal rear cover 5 through a front bearing 7 and a rear bearing 8, an external thread 9 positioned on the side surface of the metal front cover 4 is rotatably connected with an internal thread 10 on the inner surface of the machine shell 1, at least 3 riveting point parts 11 are arranged on the end surface of the machine shell 1 close to one side of the metal rear cover 5 along the circumferential direction, and the machine shell 1 is connected with the metal rear cover 5 through at least 3 riveting point parts 11;
a fan blade 13 is sleeved on the rotor shaft 6 and is positioned between the stator 2, the rotor core 3 and the metal front cover 4, a plurality of exhaust holes 15 are arranged at intervals in the area of the casing 1 positioned at the periphery of the fan blade 13, and a plurality of air inlet holes 14 are arranged at intervals on the metal rear cover 5.
The casing 1 is an aluminum casing, and the metal front cover 4 and the metal rear cover 5 are both aluminum covers.
The diameter ratio of the length of the casing 1 to the metal front cover 4 and the metal rear cover 5 is 1: 0.95, the air inlet holes 14 are arc-shaped air inlet holes.
Example 2: a brushless dc motor comprising: the motor comprises a machine shell 1, a stator 2 and a rotor core 3 which are positioned in the machine shell 1, wherein the rotor core 3 is positioned in the stator 2, a metal front cover 4 and a metal rear cover 5 are respectively installed on the front end surface and the rear end surface of the machine shell 1, the rotor core 3 is fixed on the outer side surface of a rotor shaft 6, two ends of the rotor shaft 6 are respectively connected with the metal front cover 4 and the metal rear cover 5 through a front bearing 7 and a rear bearing 8, an external thread 9 positioned on the side surface of the metal front cover 4 is rotatably connected with an internal thread 10 on the inner surface of the machine shell 1, at least 3 riveting point parts 11 are arranged on the end surface of the machine shell 1 close to one side of the metal rear cover 5 along the circumferential direction, and the machine shell 1 is connected with the metal rear cover 5 through at least 3 riveting point parts 11;
a fan blade 13 is sleeved on the rotor shaft 6 and is positioned between the stator 2, the rotor core 3 and the metal front cover 4, a plurality of exhaust holes 15 are arranged at intervals in the area of the casing 1 positioned at the periphery of the fan blade 13, and a plurality of air inlet holes 14 are arranged at intervals on the metal rear cover 5.
The casing 1 is an aluminum casing, and the metal front cover 4 and the metal rear cover 5 are both aluminum covers.
The diameter ratio of the length of the casing 1 to the metal front cover 4 and the metal rear cover 5 is 1: 1, the performance is at its peak after optimization of the size ratio.
The air inlet holes 14 are arc-shaped air inlet holes.
The rear end face of the rotor shaft 6 is flush with the outer surface of the metal rear cover 5.
When the direct current brushless motor is adopted, two ends of a rotor shaft of the direct current brushless motor are respectively connected with a metal front cover and a metal rear cover through a front bearing and a rear bearing, external threads on the side surface of the metal front cover are rotatably connected with internal threads on the inner surface of a machine shell, at least 3 riveting point parts are arranged on the end surface of the machine shell close to one side of the metal rear cover along the circumferential direction, the machine shell is connected with the metal rear cover through at least 3 riveting point parts, the motor is convenient to assemble and subsequently disassemble and maintain, and meanwhile, the three parts form a metal sealing whole, the electromagnetic flux of a stator winding and a rotor winding is enhanced, so that the power and the efficiency of the motor are improved;
besides, the fan blades are sleeved on the rotor shaft and positioned between the stator, the rotor core and the metal front cover, a plurality of exhaust holes are formed in the peripheral area of the fan blades of the machine shell at intervals, a plurality of air inlet holes are formed in the metal rear cover at intervals, when the motor rotates at a high speed, the rotor core and the fan blades drive air to circulate, external air can enter the motor from the air inlet holes and is exhausted from the exhaust holes, cooling of the motor is guaranteed, and the service life of the motor is prolonged.
The above embodiments are merely illustrative of the technical ideas and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.
Claims (5)
1. A brushless DC motor, characterized in that: the method comprises the following steps: a metal casing (1), a stator (2) and a rotor core (3) which are positioned in the metal casing (1), wherein the rotor core (3) is positioned in the stator (2), the front end surface and the rear end surface of the metal casing (1) are respectively provided with a metal front cover (4) and a metal rear cover (5), the rotor core (3) is fixed on the outer side surface of a rotor shaft (6), two ends of the rotor shaft (6) are respectively connected with the metal front cover (4) and the metal rear cover (5) through a front bearing (7) and a rear bearing (8), an external thread (9) positioned on the side surface of the metal front cover (4) is rotationally connected with an internal thread (10) on the inner surface of the metal casing (1), the end face of one side, close to the metal rear cover (5), of the metal shell (1) is provided with at least 3 riveting point parts (11) along the circumferential direction, and the metal shell (1) is connected with the metal rear cover (5) through the at least 3 riveting point parts (11);
a fan blade (13) is sleeved on the rotor shaft (6) and located between the stator (2), the rotor core (3) and the metal front cover (4), a plurality of exhaust holes (15) are formed in the area, located on the periphery of the fan blade (13), of the metal casing (1) at intervals, and a plurality of air inlet holes (14) are formed in the metal rear cover (5) at intervals.
2. The brushless dc motor of claim 1, wherein: the metal casing (1) is an aluminum casing, and the metal front cover (4) and the metal rear cover (5) are both aluminum covers.
3. The brushless dc motor of claim 1, wherein: the diameter ratio of the length of the machine shell (1) to the metal front cover (4) and the metal rear cover (5) is 1: 0.9 to 1.1.
4. A brushless dc motor according to claim 3, wherein: the air inlet holes (14) are arc-shaped air inlet holes.
5. The brushless dc motor of claim 1, wherein: the rear end face of the rotor shaft (6) is flush with the outer surface of the metal rear cover (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122080807.9U CN215990391U (en) | 2021-08-31 | 2021-08-31 | Brushless DC motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122080807.9U CN215990391U (en) | 2021-08-31 | 2021-08-31 | Brushless DC motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215990391U true CN215990391U (en) | 2022-03-08 |
Family
ID=80521087
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122080807.9U Active CN215990391U (en) | 2021-08-31 | 2021-08-31 | Brushless DC motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215990391U (en) |
-
2021
- 2021-08-31 CN CN202122080807.9U patent/CN215990391U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP2194633B1 (en) | Brushless ac generator for vehicle | |
| CN201478944U (en) | Automobile generator with double air passages and double fans | |
| CN112383191A (en) | Self-fan cold axial flux motor with external centrifugal fan | |
| CN219164387U (en) | Self-radiating brushless motor with spiral guide vanes | |
| CN215990391U (en) | Brushless DC motor | |
| CN106849503A (en) | A kind of permanent-magnetic outer rotor motor of the built-in fan blade of the high-power nodal wood type of small volume | |
| CN207801671U (en) | A kind of motor fan cover that thermal diffusivity is strong | |
| CN217183127U (en) | Heat radiator for external rotor electric machine | |
| CN213402732U (en) | Heat radiation structure of motor for electric tool | |
| CN213511284U (en) | High-efficient radiating motor fan structure | |
| CN213817535U (en) | Array type double-stator motor | |
| CN201536279U (en) | Direct current motor | |
| CN212627367U (en) | Hollow shaft inner rotor motor | |
| CN212130836U (en) | Fan provided with flow collecting piece | |
| CN210092988U (en) | Optimized heat dissipation type surface-mounted permanent magnet motor rotor and motor | |
| CN207884450U (en) | A kind of air-flow cooling motor | |
| CN215990392U (en) | Brushless DC motor | |
| CN102025223A (en) | Dual-duct dual-fan automotive generator | |
| CN206727858U (en) | A kind of extra small high-power density permanent magnetic external rotor motor device of volume | |
| CN208078821U (en) | A kind of synchronous magnetic resistance motor with End winding radiator structure | |
| CN112383192A (en) | Self-cooling axial flux motor with built-in axial flow fan | |
| CN220915090U (en) | AC motor | |
| CN221900680U (en) | High-efficiency motor with self-cooling function | |
| CN216134381U (en) | Low-noise brushless motor | |
| CN201063467Y (en) | High-power high-voltage solid rotor permanent-magnet motor rotor shaft radial ventilation system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |